PXT NiB Complete BCG Full Auto Nickel Boron
The PXT NiB BCG is machined from 8620 steel alloy and coated with our hard-wearing Nickel Boron coating. Tougher than nails, harder than hard chrome, and incredibly smooth. NiB corrosion resistance and reduced friction translates into sleek operations and wipe-down cleanup.
- M-16 Mil-Spec Carrier
- 8620 Steel, MPI Tested
- 4140 Carrier Key
- Mil-Spec Staked Grade 8 Bolts
- Upgraded Extractor O-Ring